Nail holding building composition



Aug. 9, 1938,

C. F. DAVIS NAIL HOLDING BUILDING COMPOSITION Filed June 1, 1955INVENTOR.

ATTORNEY.

Patented Aug. 9, 1938 I g i 2,126,622

UNITED STATES PATENT OFFICE NAIL HOLDING BUILDING COMPOSITION Clarke F.Davis, Short Hills, N. J., asslgnor to American: Cyanamid & ChemicalCorporation, New York, N. Y., a corporation of Delaware Application June1, 1935, Serial No. 24,513

2 Claims. (01. 72-115) The present invention relates to a building Inthe drawing:

material. Fig. l is a sectional view of a building unit The principalobject of the invention is the constructed according to this invention;

provision of a light, cheap building construction Fig. 2 is a partialperspective view showing a a unit, which will have superior nail holdingqualimethod of waterproofing a core; 5 ties such as that of wood,although made Fig.,3 is a view similar to Fig. 2 showing an primarily ofa cast composition. alternative method of water-proofing.

It has been proposed to make studding of such Referring now to theembodiment illustrated, a cementitious material as gypsum, hydrauliccenail holding core is shown at l which may be m ment, lime or concrete,but experience has shown of any shape and of any material which willhave that units made of such composition have very these qualities,although wood is preferred bepoor nail holding qualities and nailsdriven therecause of its ease of working, availability and into have atendency to loosen up under any sort cheapness. If the core is of awater absorbent of vibration, while at the same time the cementinature,then it is suitably treated to make its tious material of which thestudding is made has exterior water repellant 0r Water-Drool and this 15a tendency to crack and spall when nailsare treatment is indicated at 2.It maybeimmersed driven thereinto. in a bath of any suitable waterrepellent com- It has been proposed to imbed wooden slats positions,either with or without heat and either in such composition studdin so asto take the at atmospheric or h h r pr s. i impr benefit of the nailholding qualities of the wood. nation further than at the mere surfaceis de- 20 Experience in the field has demonstrated that Sired- If SuchWater-Proof c p t on as this teaching is not altogether satisfactory dueasphaltum are to be Used. mere Surface t to the fact that such woodeninserts have the merit Such as y Painting 0 he l e as e tendency toabsorb water from the cementitious fOllhd be Sufliciehtr ,25 mix casttherearound with the result that upon Where Sheet t -p flofl g materialis used, drying, such insertsv warp and/or swell with 511611aswater-prflof D e". eta c s eet consequent cracking of the cementitiousexthe like, they y be pp d in he manne terior. as in Fig. 2, where thesheet 3 is wrapped around Experiments over a, long period of ti h thecore I and. the loose flap 4 made to overlie demonstrated that astudding of cementitious p 5 and Suitably ted n P ac s y 30 materialhaving a wood core may be very satismeans of asphaltum, water 8 88.0 ySuitable factorily employed which is not subject to the adhesivemediumabove deficiency if the core is treated prior to Thus d, e e ay bethen P aced n a casting the cementitious material therearound, Suitablemold and Plastic cementitious mix with a water-proofing composition ormaterial capable of a Set cast therefllouhd to form an 35 to preventwater absorption. terior 6. Due to the fact that the core has been Tothis end, the invention contemplates treated to prevent waterabsorption, the core is building unit having a nail holding core ofwood, s p ve fr m ro i he xt ri r l y nailable concrete, wood pulp orany composition 6 of its ater dur g its p as Stage, While at 40 whichhas nail holding qualities more superior the m i he c r is pr ventedfrom swell- 40 than that of the unit itself, coated or lmpreging due toany Water absorptionnated with water repellant material such as Units soconstructed should, of coursebe so asphaltum compositions, pine oil,water-proof proportioned as to make the holding core coatingcompositions of the synthetic resin type, near enough to the surface theas to be watebmoof Cellophane, or other sheet mate reached by the nailsdriven thereinto and this is rial such as metal foil or the like, thethus waterg g zggg g fg zgi g i zgi ig g 3 g; 5 proofed core beingencased in a cementitious v are to be put. material such as gypsumeither with with When nails are driven through the cementitious y outfibrous admixtures hyd! 311116 cement. lime material i'into the core I,the fact that the end 50 o c e eof the nail is securely held in thecore, makes The invention further consists in the novel available notonly such abilities attributable to arrangement d s t n O parts mo thecore alone, but also makes available the full fully hereinafter shownand described in the nail holding abilities of the cementitiousmateaccompanying drawing. rial. This would not be true if the nail were55 permitted any amount of movement or vibratlon.

While in the above specification certain cementitious compositions havebeen mentioned as the encasing material, certain water-proofingtreatment has been mentioned. and certain nail holding compositions havebeen enumerated, yet it is to be understood that the invention is in nowise to be limited to these particular materials as they are mentionedmerely as illustrative and the invention is to be construed broadly asdirected to the combination of a nail holding core which is waterabsorbent either due to porosity. absorption, adsorption. or itscellular nature, treated either on its superficial surface orimpregnated with a material which will prevent water being taken up bythe core, the core and its treatment being encased in anywatercontaining plastic mix which will take a set.

In like manner, the unit as a whole is not to be limited to studding.but is to be construed broadly as directed to any type of constructionin which the above elements occur.

I claim:

1. As an article of manufacture, a nail holding core having on itssuperficial surface a sheet metal material impervious to moisture, and asurrounding nail penetrable set cementitious layer.

2. The article of claim 1 in which the encasing cementitious layer isgypsum.

CLARKE F. DAVIS.

